JPH10102745A - Joining structure of wooden plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joining structure of wooden plates which is capable of performing the flexible joining, difficult to generate inconvenience such as breakage during the handling, and capable of easily performing the joining in a short time. SOLUTION: In this joining structure of wooden plates, a recessed stepped part 2 is formed in a part on a back side in joining end faces of wooden plates 1, the joining end faces are butted to each other to form the recessed stepped part 2 into a recessed groove 3, the hot melt adhesive 4 and the elastic adhesive 5 are successively fed in the recessed groove 3 to perform the joining. In this case, the hot melt adhesive 4a of rapid hardening type is fed to perform the temporary flexing, and the elastic adhesive 5 is fed to perform the joining.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for architectural wooden boards such as floor materials, wall materials or ceiling materials.
More particularly, the present invention relates to a joining structure of wooden boards formed by joining butted end faces of small-sized wood boards to form a large-sized wood board.

[0002]

2. Description of the Related Art A conventional wood board joining structure is shown in FIG.
There are the following. In the joining structure of such a wooden board, first, a soft hot-melt adhesive 4 is supplied to the concave groove 3 formed on the back surface side of the joined end face, and further, the soft hot-melt adhesive 4 is supplied. An elastic adhesive 5 such as a urethane-based adhesive is supplied onto the agent 4 and joined.

More specifically, first, a hot-melt adhesive 4 is supplied in a state where the wooden board 1 is held in a mold with the joining end faces abutting, and after the curing of the hot-melt adhesive 4 is completed. Then, the elastic adhesive 5 is supplied on the conveyor after being removed from the mold. In this case, a cooling zone is provided in the middle of the process in order to cure the hot melt adhesive 4 quickly.

[0004] According to the joining structure of the wooden boards as described above,
Since the elastic adhesive 5 is supplied after being removed from the mold, the supply of the elastic adhesive 5 is easy, the maintenance of the mold is easy, and troubles such as dirt around can be prevented. It is.

[0005] Further, in the above-mentioned joining structure of wooden boards, a flexible joining state is provided by the elastic adhesive 5 so that it is difficult to break during handling and construction. In other words, the hot melt adhesive 4 alone is susceptible to impact and easily breaks down.

[0006]

However, in the above-mentioned conventional example, it takes a long time to cure the hot-melt adhesive 4, so that it is not possible to quickly shift to the step of supplying the elastic adhesive 5. is there. For this reason, a cooling zone is required, a jig such as a mold for temporary fixing is required, and the manufacturing operation is complicated, and the manufacturing takes a long time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a flexible joint, which is unlikely to cause breakage or other trouble during handling and construction. It is an object of the present invention to provide a joining structure of wood materials that can be easily joined in a short time.

[0008]

According to the first aspect of the present invention, a concave step portion 2 is formed on a back surface side portion of a joining end face of a wooden board 1, and the joining end faces abut against each other. The step portion 2 is formed as a concave groove 3, and a hot-melt adhesive 4 and an elastic adhesive 5 are sequentially supplied to the concave groove 3, and in a joining structure of a wooden board formed by joining, a quick-curing hot-melt adhesive is provided. The adhesive 4a is supplied and temporarily fixed, and the elastic adhesive 5 is supplied and joined.

In such a joining structure of wooden boards, the quick-curing hot-melt adhesive 4a is quickly cured and temporarily fixed, and after this state, the joining end face is removed. The need for a holding means for maintaining the butted state is eliminated.

According to a second aspect of the present invention, in the first aspect of the invention, a soft hot-melt adhesive 4b is interposed between the bottom surface of the groove and the quick-curing hot-melt adhesive 4a. It is characterized by comprising.

[0011] In such a joining structure of wooden boards, the soft hot-melt adhesive 4b compensates for the too hard point of the quick-curing hot-melt adhesive 4a.

[0012] The invention according to claim 3 is the invention according to claims 1 and 2.
In the invention according to any one of the above, the elastic adhesive 5 is formed by using a urethane-based adhesive.

In such a joint structure of a wooden board, a suitable elasticity is obtained by the urethane-based adhesive.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a cross-sectional view of a construction of a flooring having a wood board joining structure in this embodiment, FIG. 2 is a plan view of the flooring, and FIG. 3 is a rear view of the flooring. It is.
FIG. 1 shows a cross section taken along line YY in FIG.

As shown in the above figures, this flooring uses two substantially rectangular wooden boards 1, each having one long side end face as a joining end face, and these joining end faces being slightly shifted. It is formed by joining at positions.

The wooden board 1 is formed by attaching a rectangular veneer 1b to the surface of a base material 1a such as plywood.
Male fruit 6 and female fruit 7 are formed on the opposite end faces, respectively. In addition, a single horizontal groove 11 is formed substantially at the center of the veneer 1b serving as the front surface in parallel with the end face on the long side, and an orthogonal vertical groove 12 is formed from one end face to the position of the horizontal groove 11 from one end face. These are drilled at appropriate intervals, and one is drilled from the other end face. These horizontal grooves 11 and vertical grooves 12 are formed such that when the floor material is adhered to the floor base 9 without gaps and laid, the small pieces divided by the horizontal grooves 11 and vertical grooves 12 are formed in a random manner. It is provided so as to exhibit the appearance laid.

Further, as shown in FIG. 3, the back surface side of the flooring material is provided with grooves 8 formed vertically and horizontally, and the grooves 8 are formed so as to contribute to soundproofing.

The joining end face of one of the wooden boards 1 as described above is an end face on which the male nut 6 is formed, and a portion on the back surface side of the joining end face on which the male nut 6 is formed is notched. Thus, a concave step 2 is formed. The joining end face of the other wooden board 1 is an end face on which the female nut 7 is formed, and by joining these joining end faces to each other to form an actual joining state, the concave step portion 2 is formed into the concave groove 3. And Then, the hot melt adhesive 4
And the elastic adhesive 5 are sequentially supplied and joined, whereby a floor material in which the two wooden boards 1 are joined can be formed. As the hot-melt adhesive 4, a fast-curing hot-melt adhesive 4a and a soft hot-melt adhesive 4b are used.

More specifically, the wooden board 1 is held with the joint end faces abutting each other and the concave groove 3 facing upward. Such a holding state can be obtained by setting the wooden board 1 in a mold or the like. Then, while holding in this manner, a soft hot-melt adhesive 4b is supplied,
Further, a quick-curing hot-melt adhesive 4a is supplied. After the curing of the fast-curing hot-melt adhesive 4a is completed, the hot-melt adhesive 4a is detached from the mold and removed on the conveyor.
To supply. That is, the hot-melt adhesive 4a having a rapid curing property is supplied to the concave groove 3 to temporarily fix it, and then the elastic adhesive 5 is supplied and joined.

More specifically, as the above-mentioned soft hot-melt adhesive 4b, Evergrip 056 (trade name, manufactured by ACI Japan) is used. As the fast-curing hot-melt adhesive 4a, The same name, Evergrip PA-233 manufactured by ACI Japan is used. In addition, as the elastic adhesive 5, a urethane-based adhesive that has a suitable elasticity and is strongly bonded is used.

In the joining structure of the wooden boards as described above, the quick-curing hot-melt adhesive 4a is quickly cured and temporarily fixed. There is no need for a mold which is a holding means for maintaining the abutted state. Therefore, since the elastic adhesive 5 can be supplied after being removed from the mold, the supply of the elastic adhesive 5 is easy, the maintenance of the mold is easy, and problems such as contamination of the surroundings can be prevented. Has been made.

In addition, since the process can be promptly shifted to the step of supplying the elastic adhesive 5, there is no need to provide a cooling zone to cool the hot melt adhesive 4 and accelerate the curing. In other words, you can omit the cooling zone,
Alternatively, the manufacturing can be simplified, and the manufacturing can be performed quickly and with simple steps.

Further, the soft hot-melt adhesive 4b compensates for the excessively hard point of the quick-curing hot-melt adhesive 4a, and the resulting bonding state is rich in flexibility, so that it is sufficiently strong. That's what makes the connection.

It is to be noted that the hot-melt adhesive 4 may be a quick-curing and flexible material, and only this one kind of hot-melt adhesive 4 may be used. As such a hot-melt adhesive 4, WW-529 (trade name, manufactured by ACI Japan) can be preferably used. The hot-melt adhesive 4 is a quick-curing adhesive, and is the above-mentioned fast-curing hot-melt adhesive 4a manufactured by ACI Japan Inc. under the trade name Evergrip PA-
It is more flexible than 233. In other words, it is not necessary to repeatedly supply the hot-melt adhesives 4a and 4b, so that it is easy to manufacture, and the flexibility does not decrease so much.

Although the above description shows an example in which the joining structure of the wooden boards of the present invention is applied to a flooring material, not only flooring materials but also wall materials or ceiling materials are similarly applied. It goes without saying that it can be applied freely.

[0027]

According to the first aspect of the present invention, the quick-curing hot-melt adhesive is quickly cured and temporarily fixed. There is no need for a mold as a holding means for maintaining the abutted state. In other words, after the wooden board is set in the mold and temporarily fixed with the hot-melt adhesive, it can be removed from the mold and the elastic adhesive can be supplied, so that the elastic adhesive can be easily supplied, In addition, maintenance of the mold is easy, and problems such as contamination of the surroundings can be prevented.

In addition, since the process can be promptly shifted to the step of supplying the elastic adhesive, the cooling zone can be omitted or simplified, and the production can be performed quickly and with a simple process.

According to the second aspect of the present invention, the soft-hot hot-melt adhesive compensates for the too hard point of the quick-curing hot-melt adhesive. For this reason, the joining state obtained is sufficiently rich in flexibility, and the joining state is strong.

According to the third aspect of the present invention, the urethane-based adhesive provides appropriate elasticity and a strong bonding state.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a construction state of a flooring material having a wooden board joining structure according to one embodiment of the present invention.

FIG. 2 is a plan view of the floor material.

FIG. 3 is a back view of the floor material.

FIG. 4 is a cross-sectional view showing a conventional wooden board joining structure.

[Explanation of symbols]

 Reference Signs List 1 wood board 1a base material 1b veneer 2 concave step 3 concave groove 4 hot melt adhesive 4a hot melt adhesive 4b hot melt adhesive 5 elastic adhesive 6 male 7 female 8 groove 9 floor base 11 Horizontal groove 12 Vertical groove

Claims (3)

[Claims] 1. A concave step is formed on a back surface side of a joining end face of a wooden board, and the joining end faces are abutted to each other to form a concave groove, and a hot melt adhesive and an elastic adhesive are bonded to the concave groove. In the joining structure of the wooden boards, which are supplied in sequence and joined together, a quick-curing hot-melt adhesive is supplied and temporarily fixed, and then an elastic adhesive is supplied and joined. And the joining structure of the wooden boards. 2. The joining of wooden boards according to claim 1, wherein a soft hot-melt adhesive is interposed between the bottom surface of the groove and the quick-curing hot-melt adhesive. Construction. 3. The joining structure for a wooden board according to claim 1, wherein a urethane adhesive is used as the elastic adhesive.